Messages in this thread | | | Date | Mon, 8 Nov 2021 15:52:35 +0100 | From | Andrew Lunn <> | Subject | Re: [PATCH 2/2] net: ethernet: Add driver for Sunplus SP7021 |
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> The switch will not recognize type of packets, regardless BPDU, PTP or any other > packets. If turning off source-address learning function, it works like an Ethernet > plus a 2-port hub.
So without STP, there is no way to stop an loop, and a broadcast storm taking down your network?
Looking at the TX descriptor, there are two bits:
[18]: force forward to port 0 [19]: force forward to port 1
When the switch is enabled, can these two bits be used?
In the RX descriptor there is:
pkt_sp: 000: from port0 001: from port1 110: soc0 loopback 101: soc1 loopback
Are these bits used when the switch is enabled?
0.31 port control 1 (port cntl1) blocking state seems to have what you need for STP.
Andrew
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